Build nurbs model based on 3d scan

Next
 From:  bartosh44
7218.1 
Hi, I need build nurbs model based on 3d scan. I imported obj to MoI with script. I would like build shape lines based on 3d scan geometry. How to do it simpliest to know that line has got same shape as original 3d scan (triangles without loops). I need to rebuild only few 2d shapes (like subd retopo in Modo).

Edit:
I know there are tools like:
http://www.rapidform.com/products/xos/overview/
http://www.vrmesh.com/products/reverse.asp
http://www.egsolutions.com/en/product/software/leios/caratteristiche/1625/2713/3012/#.VM9_NWiG_Ak

I`m looking to how do it manually in MoI
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  OSTexo
7218.2 
Hello,

That operation is very difficult in MoI. I use TSplines and Autodesk Shape Modeling for such tasks, and will be trying Mesh2Surface shortly.
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Michael Gibson
7218.3 In reply to 7218.1 
Hi Bartosh - Moi just does not have the toolset for doing that type of reverse engineering work, especially if you want to have an accurate conversion.

Those tools have a lot of special functionality that is very specific for those tasks. MoI just does not have the same tools in it.

You can find some other possible tools under the reverse engineering section of the Rhino web site:
http://www.rhino3d.com/resources/#tabs-17

I would not recommend trying to do this type of conversion manually in MoI since it is just not the right kind of tool for that type of job.

If you need only a conversion on pretty simple forms without much regard to accuracy you could attempt this technique though:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6095.1

But really the type of work that you are trying to do here is just not what MoI is designed to be used for. You pretty much need some more specialized tools to do reverse engineering.

- Michael
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  bartosh44
7218.4 In reply to 7218.3 
Thank you very much for answering.

I don`t have Rhino.
I`ve made scan of plastic bottle (SLS) and I wanted make bottle container. I`ve made Zbrush automatic retopology (quads). Imported it as obj to MoI3d. Next I used Subd MoI plugin to smooth it out. Mesh is dense but bolean operation on cube container worked just fine.



I hope in future MoI3d will have ools for resurfacing (new topology). It should allow manually create surface based on 3d scans. I think it`s actual topic becouse of 3d printing and scanning times. Or maybe some automatic solution to make that process more avaible ;)

Thanks Michael for that link with technique that is also a good way.
Attachments:

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Frenchy Pilou (PILOU)
7218.5 
Maybe you can use Decimation Master at some step of the process inside Zbrush ?

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  bartosh44
7218.6 In reply to 7218.5 
I used decimation master (bottle case), dynamesh and zremesher but you can also use only dynamesh and zremesher. There is option also to set polygroups for hard edges (zremesher).

Edit: http://pixologic.com/video/video-v2-zbc.php?videoname=https://zclassroom.s3.amazonaws.com/homeroom/lessons/videos/zremesher/zremesher-functionality.f4v

EDITED: 3 Feb 2015 by BARTOSH44

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Pierro787
7218.7 In reply to 7218.6 
I work with several 3d scanners for several months...

I confirm ZBrush (4R7) is probably the best choice to treat scanned organic models. Thomas Roussel from Pixologic have made a complete 4 hours tutorial on the subject (in french but I guess this exists also in english). You can find it on www.polysculpt.com. The last version is 64 bits and will allow to treat more than 30 millions polygons scans...

If you need pure reverse enginering from mechanical parts, then Spacelaim is probably a better alternative because you will be able to produce .STEP or .IGES or .3DM file (Zbrush is limited to .OBJ)

Pierre
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  OSTexo
7218.8 
Hello,

I've picked up Mesh2Surface, it's a slick piece of software for this sort of work, and being a Rhino plugin it has smooth I/O with MoI. At this point it's probably not great for highly organic parts, but for the model you posted it looks like you could have ended up with a very respectable solid with low deviation in around an hour or less since it looks like you could slice through that scan to sketch your profiles. I regularly load scans with millions of polys inside of Rhino on decent hardware without issue, although my scans are not super high resolution, rather around 75-80 microns point to point.

I guess it depends on what business you're in, if you're scanning object to use as digital assets then something like ZBrush or 3DCoat is more up your alley. If it's reverse engineering, design, analysis that you're doing it's probably better to just jump into tools like Rhino, Tsplines, VSR, Mesh2Surface (and MoI of course) to get to your solid models for prototyping and manufacture.
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  NastyCage
7218.9 In reply to 7218.4 
Hi, speaking about NURBS, I don't think, it's a good idea to convert Zbrush mesh to NURBS. If your scanning soft can export point clouds, you can then turn the cloud to NURBS. Here you can find the instruction. Not sure about your scanner and software you use, but I use this, to get point clouds.
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
 From:  Mike (MGG942)
7218.10 In reply to 7218.9 
Looks great but well out of my price range.
At 1/10th the cost I'd be tempted...
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged
 

Reply to All Reply to All